Benefits of a Green Roof
Storm Water Retention

• Summer:      70 – 90 % Storm water Retention
• Winter:         25-40 %   Storm water Retention

Water Filtration & Runoff:

• Moderates temperature
• Act as natural filters
• Reduce the amount of storm water runoff
• Decreases stress on sewer systems at peak flow periods

Energy Savings

Up to 50% Savings on energy heating and cooling costs

Sound Reduction

A green roof with a 12 cm (4.7 inches) substrate layer can reduce sound by 40 decibels; a 20 cm (7.9 inches) substrate layer can reduce sound by 46-50 decibels.

Improved Air Quality

Filtration of Airborne Particulates:

• A green roof will absorb heat and filter the air moving across it.

Carbon Dioxide/Oxygen Exchange:

• Through the process of photosynthesis, plants convert carbon dioxide, water and sunlight/energy into oxygen and glucose. This cyclical process supplies animals and humans with oxygen and food.
• 1.5 m² (16.15 ft² ) of uncut grass, produces enough oxygen per year to supply 1 human with their yearly oxygen intake requirement.

Temperature Regulation:  Moderation of the Urban Heat Island Effect

Phone Number: 416-971-4494 / Fax Number: 416-971-9844 www.greenroofs.net